How is a view created?
- How view is created in SQL?
- Why is view created?
- How do you write a view?
- What happens when you create a view?
How view is created in SQL?
Answer: A VIEW in SQL is created by joining one or more tables. When you update record(s) in a view, it updates the records in the underlying tables that make up the SQL View. So, yes, you can update the data in a SQL VIEW providing you have the proper privileges to the underlying SQL tables.
Why is view created?
Some of the main reasons are as follows: To simplify database structure to the individuals using it. As a security mechanism to DBAs for allowing users to access data without granting them permissions to directly access the underlying base tables.
How do you write a view?
To create a view, a user must have the appropriate system privilege according to the specific implementation. CREATE VIEW view_name AS SELECT column1, column2..... FROM table_name WHERE [condition]; You can include multiple tables in your SELECT statement in a similar way as you use them in a normal SQL SELECT query.
What happens when you create a view?
What actually happens in the database when you create a view, and what happens when you use it? association with the underlying tables. In other words, creating a view does not generate a copy of the data, neither at the time the view is defined nor at the time the view is accessed.
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